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GraphQL is a query language for web APIs and a runtime for fulfilling queries with existing data. GraphQL gives clients the power to ask for precisely what they need, making it easy to evolve APIs with powerful developer tools.

This course is an introduction to GraphQL using the Node.js JavaScript runtime environment and Apollo Server. You’ll start with an introduction to GraphQL’s architecture and functions before exploring the structure of GraphQL data and learning to perform meaningful, complex queries. You’ll then learn how to update server data using mutations. Next, you’ll explore the GraphQL type system and schemas to set up a GraphQL server using Apollo Server. Once the server is set up, you’ll implement a full GraphQL application using Apollo and Node.js.

By the end of this course, you’ll have a rich understanding of GraphQL’s architecture and methodology and be prepared to deploy GraphQL applications to the web using Apollo and Node.js.

Getting Started with GraphQL using Node.js

Every GraphQL server has a query type and may have a mutation type. This query type is similar to a regular object type, but the `mutation` and `query` types are unique because they are the entry points of every GraphQL query.


## GraphQL query type

Every GraphQL server has a query type and may have a mutation type. This query type is similar to a regular object type, but the `mutation` and `query` types are unique because they are the entry points of every GraphQL query.


# GraphQL query type

Understand the details of GraphQL query and mutation types.

Introduction

Getting to Know GraphQL

Queries

Mutations

Schemas and Types

Schema Validation

Schema Execution

Schema Introspection

GraphQL Best Practices

GraphQL Exam

Query and Mutation Types

GraphQL query type